Walking excavator model upgrade kit

Method of purchase https://item.taobao.com/item.htm?spm=a1z10.3-c.w4002-10058254375.9.CgCDGP&id=521391827821

1:12 excavator model upgrades. JDM-FF brushless planet walk. Reduction ratio of 1: 256 brushless motor 1000KV walking speed 48 rev / min. Drive tooth maximum outer diameter 8.5mm.
List of accessories: Hooray 30A3S brushless direct two-way reversing two power transfer.
Walk a block or so of each
A collector ring. Product Weight 1.3KG.
Upgrade Features: Finally a planetary reduction gear set with four pinions, more durable, higher internal gear using powder metallurgy mold precision, supporting good bullet between the collector ring and brushless motor, no buyer welding. Walking as much as possible to restore the appearance of a real car details, has simulation identity.